1.4 Relationship to Other Protocols

The DirectPlay 4 Core and Service Providers Protocol is transmitted via both the Transmission Control Protocol (TCP) [RFC793] and the User Datagram Protocol (UDP) [RFC768] protocols, as specified in [RFC791]. In addition, at the discretion of the game, all of the messages listed in this protocol might be transmitted via the DirectPlay 4 Reliable Protocol, as specified in [MC-DPL4R].